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.\" ========================================================================
.\"
.IX Title "RDF::Query::Plan 3pm"
.TH RDF::Query::Plan 3pm "2014-10-24" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RDF::Query::Plan \- Executable query plan nodes.
.SH "VERSION"
.IX Header "VERSION"
This document describes RDF::Query::Plan version 2.912.
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP """new""" 4
.el .IP "\f(CWnew\fR" 4
.IX Item "new"
.PD 0
.ie n .IP """execute ( $execution_context )""" 4
.el .IP "\f(CWexecute ( $execution_context )\fR" 4
.IX Item "execute ( $execution_context )"
.ie n .IP """next""" 4
.el .IP "\f(CWnext\fR" 4
.IX Item "next"
.ie n .IP """get_all""" 4
.el .IP "\f(CWget_all\fR" 4
.IX Item "get_all"
.PD
Returns all remaining rows.
.ie n .IP """close""" 4
.el .IP "\f(CWclose\fR" 4
.IX Item "close"
.PD 0
.ie n .IP """state ( [ $state ] )""" 4
.el .IP "\f(CWstate ( [ $state ] )\fR" 4
.IX Item "state ( [ $state ] )"
.PD
Returns the current state of the plan (either \s-1READY, OPEN,\s0 or \s-1CLOSED\s0).
If \f(CW$state\fR is provided, updates the plan to a new state.
.ie n .IP """logging_keys""" 4
.el .IP "\f(CWlogging_keys\fR" 4
.IX Item "logging_keys"
.PD 0
.ie n .IP """explain""" 4
.el .IP "\f(CWexplain\fR" 4
.IX Item "explain"
.PD
Returns a string serialization of the query plan appropriate for display
on the command line.
.ie n .IP """sse""" 4
.el .IP "\f(CWsse\fR" 4
.IX Item "sse"
.PD 0
.ie n .IP """serialize""" 4
.el .IP "\f(CWserialize\fR" 4
.IX Item "serialize"
.PD
Return a serialization of the query plan.
.ie n .IP """delegate""" 4
.el .IP "\f(CWdelegate\fR" 4
.IX Item "delegate"
Returns the delegate object if available.
.ie n .IP """referenced_variables""" 4
.el .IP "\f(CWreferenced_variables\fR" 4
.IX Item "referenced_variables"
Returns a list of variable names that are referenced by this plan.
.ie n .IP """as_iterator ( $context )""" 4
.el .IP "\f(CWas_iterator ( $context )\fR" 4
.IX Item "as_iterator ( $context )"
Returns an RDF::Trine::Iterator object for the current (already executed) plan.
.ie n .IP """is_update""" 4
.el .IP "\f(CWis_update\fR" 4
.IX Item "is_update"
Returns true if the plan represents an update operation.
.ie n .IP """label ( $label => $value )""" 4
.el .IP "\f(CWlabel ( $label => $value )\fR" 4
.IX Item "label ( $label => $value )"
Sets the named \f(CW$label\fR to \f(CW$value\fR for this plan object.
If no \f(CW$value\fR is given, returns the current label value, or undef if none
exists.
.ie n .IP """graph_labels""" 4
.el .IP "\f(CWgraph_labels\fR" 4
.IX Item "graph_labels"
.PD 0
.ie n .IP """generate_plans ( $algebra, $execution_context, %args )""" 4
.el .IP "\f(CWgenerate_plans ( $algebra, $execution_context, %args )\fR" 4
.IX Item "generate_plans ( $algebra, $execution_context, %args )"
.PD
Returns a list of equivalent query plan objects for the given algebra object.
.ie n .IP """plan_node_name""" 4
.el .IP "\f(CWplan_node_name\fR" 4
.IX Item "plan_node_name"
Returns the string name of this plan node, suitable for use in serialization.
.ie n .IP """plan_prototype""" 4
.el .IP "\f(CWplan_prototype\fR" 4
.IX Item "plan_prototype"
Returns a list of scalar identifiers for the type of the content (children)
nodes of this plan node. These identifiers are recognized:
.Sp
.Vb 10
\& * \*(AqA\*(Aq \- An RDF::Query::Algebra object
\& * \*(Aqb\*(Aq \- A boolean integer value (0 or 1)
\& * \*(AqE\*(Aq \- An expression (either an RDF::Query::Expression object or an RDF node)
\& * \*(Aqi\*(Aq \- An integer
\& * \*(AqJ\*(Aq \- A valid Project node (an RDF::Query::Expression object or an Variable node)
\& * \*(AqN\*(Aq \- An RDF node
\& * \*(AqP\*(Aq \- A RDF::Query::Plan object
\& * \*(Aqq\*(Aq \- A RDF::Query object
\& * \*(AqQ\*(Aq \- An RDF::Trine::Statement::Quad object
\& * \*(Aqs\*(Aq \- A string
\& * \*(AqT\*(Aq \- An RDF::Trine::Statement object
\& * \*(Aqu\*(Aq \- A valid URI string
\& * \*(AqV\*(Aq \- A variable binding set (an object of type RDF::Query::VariableBindings)
\& * \*(Aqw\*(Aq \- A bareword string
\& * \*(AqW\*(Aq \- An RDF node or wildcard (\*(Aq*\*(Aq)
\& * \*(Aq*X\*(Aq \- A list of X nodes (where X is another identifier scalar)
\& * \*(Aq\eX\*(Aq \- An array reference of X nodes (where X is another identifier scalar)
.Ve
.ie n .IP """plan_node_data""" 4
.el .IP "\f(CWplan_node_data\fR" 4
.IX Item "plan_node_data"
Returns the data for this plan node that corresponds to the values described by
the signature returned by \f(CW\*(C`plan_prototype\*(C'\fR.
.ie n .IP """subplans_of_type ( $type [, $block] )""" 4
.el .IP "\f(CWsubplans_of_type ( $type [, $block] )\fR" 4
.IX Item "subplans_of_type ( $type [, $block] )"
Returns a list of Plan objects matching \f(CW$type\fR (tested with \f(CW\*(C`isa\*(C'\fR).
If \f(CW$block\fR is given, then matching stops descending a subtree if the current
node is of type \f(CW$block\fR, continuing matching on other subtrees.
This list includes the current plan object if it matches \f(CW$type\fR, and is
generated in infix order.
.SH "AUTHOR"
.IX Header "AUTHOR"
.Vb 1
\& Gregory Todd Williams <gwilliams@cpan.org>
.Ve